Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec4d6472eca3eed…

MALICIOUS

PDF

79.8 KB Created: 2021-03-25 16:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df921823961b388c36619f20fafcffa2 SHA-1: 5497c48961dea1f4cfe8a0f9e03c2a4f85b19922 SHA-256: 0ec4d6472eca3eed5da0d42bc8d5953eb88e546574a05829feb18218b096b340
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=ambersil+tufcut+data+sheet PDF link annotation
    • http://tricitysikhs.com/94965431866uvd7x.pdfIn PDF document text
    • http://present-mag.ru/elunevision_reference_studio_4k_tab-_tensioned_screen_reviewktw5e.pdfIn PDF document text
    • http://oneitshop.info/x3_terran_conflict_mission_guideny70s.pdfIn PDF document text
    • http://bettermoneytips.com/masukejajebepor31mw4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/21729968749.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/wusunazepikutolegoleti.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/38311312126.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_2252017a9742481fac8d2d7a8281feac.pdf?index=trueIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_5db9ff71644f4ad89f1ed74f4d512a24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/vidoxosawemogetorij.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/novijimaf.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/70412239380.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/405634114.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/83625041779.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/number_9_worksheets_for_pre_k.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/percy_jackson_and_the_olympians_book_order.pdfIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_dfc645a07d50498f9b81a1d808691ead.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_21ffa0e9ac8e472fad1685c98bd6ce0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zikeko/router_technicolor_tc8305c_especificaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/12678273913.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_27cd8f6adbf94008a5a0bed571a11421.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_3eb82cdb9cee41c1bc0017f64306c134.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_68152622cb0e4b58b7f57e366a8a9338.pdf?index=trueIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_66b36dcece854ebfa8e89e129a530328.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/cuales_son_los_pronombre_relativos_en_ingles.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 5392 bytes
SHA-256: 14f306c703bfb2ed4a147fb3b36235754d8af9e382374d71382a2ca3a732ccf8
font_01_sfnt_off000108d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D5 11476 bytes
SHA-256: daa740503162661106c7babe6a057e37dc96f463d2f3492945d2c443563e2177

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